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A step-by-step guide on how to use cadence, an electronic design automation software, to create and simulate electronic circuits. It covers topics such as creating a new project, adding libraries, placing parts, setting up simulations, and interpreting simulation results. Essential for students and professionals in electrical engineering and electronics design.
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Open Orcad Capture under Engineering
Software
Under FILE, choose NEW, PROJECT
The following box should appear… To simulate a design, choose Analog or Mixed A/D. Choose where you will save it and what you will call it.
Click OK
In the next box, choose if you want to
create a blank project or one based on an existing project. Click OK.
A blank schematic page will appear.
This is where you will draw your schematic. Important: Notice that there is a PSpice menu on the menu bar. If this is not there, you will not be able to simulate your circuit.
The top of the schematic page will have the following toolbar:
Zoom buttons are here:
The parts that you use will be listed here for easy access:
These buttons are used for measurements on your schematic during simulations:
These buttons are used for creating a new simulation profile, changing the profile characteristics, and running your simulation:
The libraries that contain parts that will
allow you to simulate are found in folders labeled PSpice. These parts have PSpice model attributes with them.
Choose the libraries that you want to add. Sometimes it is hard to know what library parts are in. If you know the name of the part that you want, you can also search for the part.
listed here: Select the part that you want to place.
will keep a record of each type of part you use in a place called Design Cache.
While you place your parts, use the wire button to place wires.
It is found on the right-hand side toolbar. Make sure that you have good connections.
Cadence is really picky about which GND you use when simulating a circuit. To get this GND, choose the GND button.
The following box should appear where you can add a library that contains the proper GND. The library should once again come from the PSpice folder as these parts have simulation attributes with them. The best way to know that you have the right one is by checking if it has a zero next to it.
If you need to change the internal parameters of the component, click on the component so that it is highlighted. Under the Edit menu, choose PSpice Model. The following widow should appear.
Change the parameters that need to be changed, and then save it. This will force the same parameters for this type of component in this project. Next time that you use this piece in this project, it will have these changed parameters.
Once you have named it, click OK , and the following simulation settings widow will pop up.
This is where you choose what you want to do when you simulate. In this menu, you can choose what type if simulation to do (Transient, DC Sweep, AC Sweep, or Bias Pt) There are options for each type of simulation. If you want to restore your last simulation data points, you would click to this menu. The last simulation will not be overwritten. Once you have everything figured to how you want it, click OK. To simulate, you need to push the play button.
Once you push Run, the following widow will appear as Spice checks for errors and completes the simulation.
out
V
12V
out
Q Q2N
V
V
V
-12V
VEE
0
C 5p
RBIAS 20k
V RS 1k
Q Q2N
VDD
0
Q Q2N
RC 10k
VEE
Q Q2N
RC 10k
0
VDD
RS 1k
